2
2 pH Scale The pH scale: Is used to indicate the acidity of a solution. Has values that usually range from 0 to 14. Is acidic when the values are less than 7. Is neutral with a pH of 7. Is basic when the values are greater than 7.

14
14 pOH The pOH of a solution Is analogous to the pH value on the pH scale. Is based on the [OH − ]. Has high pOH values with low [OH − ] and high [H 3 O + ]. Is equal to the - log [OH - ] pOH = - log [OH - ]. Added to the pH value is equal to pH + pOH = 14.0